I think it'd be better for me to post this here than in the thread, it'd be a bit off-key saying stuff about the tiering system in a discussion about Pokémon roles. Feel free to delete this.
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Short answer, I just do and i'm a cynical bastard.
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I can't say I don't act like this either.
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Long answer, I have a fundamental problem with those who proscribe to the tier system, because a vast majority of them take it for gospel on what to use, how useful a pokemon is, and so forth, and not how much it is used.
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I see what you're saying, and I know that this is exceptionally common among newer players. However, you have to come to face with the fact that this is a competitive environment, and players will use the best Pokémon they can to get the advantage. There are wonderful Pokémon that have roles in OU that can't be filled well or as well by any other Pokémon, and some scrubs may think that Slowbro isn't as good as Gliscor just because it's in a lower tier. It's not true, but I think the cons that come with the tiering system do not outweigh the pros. You say you enjoy the lower tiers, but without the tiering system, there would be no lower tiers.
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Basically, a lot of people who are misinformed about the system tend to go power only and create no ingenuity with their sets, then bash other pokemon from the other tiers as inferior, when chances are they never even played with them before. And since I tend to hang out in the UU/RU/NU sections of the system, it bothers me a lot when people misconstrue it.
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If you play the lower tiers, such as RU, you can't say Yanmega is fantastic in every tier just because it's good in RU. It's the same in a different sense, Quagsire is great in OU, but it's pretty bad somewhere like RU. The metagames are different, so I'm kind of being lead out as to the validity of your opinion.
Oh, and happy belated birthday.